The incoming acting IRS Commissioner, Daniel Werfel, could try to clean house — but he’d have to be prepared for a lengthy appeals process.

Under federal rules, a fired government worker has the right to appeal to the Merit Systems Protection Board. He or she can challenge the decision, argue that their actions don’t meet the threshold for termination and ask to be reinstated — especially if there was no warning of trouble in past performance reviews.

The board is set up so fired employees appealing their termination get two chances to prove they should stay. Their first stop is at the merit board’s regional level, which — for the Cincinnati-based IRS employees in question — would be in Chicago.

The initial appeals take an average of 93 days to process, said William Spencer, a spokesman for the board.

If the regional board rules against the IRS employees, they could appeal to the national Washington, D.C.-based board, which takes on average another 245 days.